<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on"
             label-position="left">

      <div class="title-container">
        <h3 class="title">
          {{ $t('login.title') }}
        </h3>
        <lang-select class="set-language"/>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user"/>
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          :placeholder="$t('login.username')"
          name="username"
          type="text"
          tabindex="1"
          autocomplete="on"
        />
      </el-form-item>

      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password"/>
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            :placeholder="$t('login.password')"
            name="password"
            tabindex="2"
            autocomplete="on"
            @keyup.native="checkCapslock"
            @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"/>
          </span>
        </el-form-item>
      </el-tooltip>

      <el-form-item prop="captcha">
        <span class="svg-container">
          <svg-icon icon-class="user"/>
        </span>
        <el-input
          ref="captcha"
          v-model="loginForm.captcha"
          :placeholder="$t('login.captcha')"
          name="captcha"
          type="text"
          tabindex="1"
          autocomplete="on"
          style="width: 50%"
        >
        </el-input>
        <el-button :loading="captchaBtnLoading" :disabled="captchaBtnDisabled" style="width:35%;margin-left: 5%"
                   @click.native.prevent="getReCaptcha">
          {{ captchaTitle }}
        </el-button>
      </el-form-item>
      <img :src="captchaImg" alt="" style="display: block;margin-left: auto;margin-right: auto;margin-bottom: 20px">
      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
                 @click.native.prevent="handleLogin">
        {{ $t('login.logIn') }}
      </el-button>

      <div style="position:relative">
        <div class="tips">
          <a href="/index">
            <a-icon type="arrow-left"/>
            博客首页</a>
        </div>

        <!--        <el-button class="thirdparty-button" type="primary" @click="showDialog=true">-->
        <!--          {{ $t('login.thirdparty') }}-->
        <!--        </el-button>-->
      </div>
    </el-form>

    <el-dialog :title="$t('login.thirdparty')" :visible.sync="showDialog">
      {{ $t('login.thirdpartyTips') }}
      <br>
      <br>
      <br>
      <social-sign/>
    </el-dialog>
  </div>
</template>

<script>
import LangSelect from '@/components/LangSelect'
import SocialSign from './components/SocialSignin'
import {getAction} from "@/api/manage";

export default {
  name: 'Login',
  components: {LangSelect, SocialSign},
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!value) {
        callback(new Error('请输入用户账号！'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (!value) {
        callback(new Error('请输入用户密码！'))
      } else {
        callback()
      }
    }
    const validateCaptcha = (rule, value, callback) => {
      if (!value) {
        callback(new Error('请输入下方验证码！'))
      } else {
        callback()
      }
    }
    return {
      url: {
        getCaptcha: '/sys/getCaptcha'
      },
      loginForm: {
        captcha: '',
        username: '',
        password: ''
      },
      loginRules: {
        username: [{required: true, trigger: 'blur', validator: validateUsername}],
        password: [{required: true, trigger: 'blur', validator: validatePassword}],
        captcha: [{required: true, trigger: 'blur', validator: validateCaptcha}]
      },
      passwordType: 'password',
      capsTooltip: false,
      loading: false,
      showDialog: false,
      redirect: undefined,
      otherQuery: {},
      captchaBtnDisabled: false,
      captchaTimer: '',
      captchaSecond: '',
      captchaBtnLoading: false,
      captchaImg: '',
      checkKey: '',
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        const query = route.query
        if (query) {
          this.redirect = query.redirect
          this.otherQuery = this.getOtherQuery(query)
        }
      },
      immediate: true
    }
  },
  created() {
    this.getCaptcha()
    // window.addEventListener('storage', this.afterQRScan)
  },
  mounted() {
    if (this.loginForm.username === '') {
      this.$refs.username.focus()
    } else if (this.loginForm.password === '') {
      this.$refs.password.focus()
    }
  },
  //计算属性
  computed: {
    captchaTitle() {
      return this.captchaBtnDisabled ? `重新获取 ( ${this.captchaSecond} ) s` : '获取验证码';
    },
  },
  destroyed() {
    // window.removeEventListener('storage', this.afterQRScan)
  },
  methods: {
    checkCapslock(e) {
      const {key} = e
      this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loginForm.checkKey = this.checkKey
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm)
            .then(() => {
              this.$router.push({path: this.redirect || '/', query: this.otherQuery})
              this.loading = false
            })
            .catch((res) => {
              this.getCaptcha()
              this.timeDown()
              // console.log(res)
              this.loading = false
            })
        } else {
          return false
        }
      })
    },
    getOtherQuery(query) {
      return Object.keys(query).reduce((acc, cur) => {
        if (cur !== 'redirect') {
          acc[cur] = query[cur]
        }
        return acc
      }, {})
    },
    getCaptcha() {
      let that = this
      getAction(that.url.getCaptcha).then(res => {
        if (res.success) {
          that.captchaImg = res.result.image
          that.checkKey = res.result.key
          that.captchaBtnLoading = false
        }
      }).catch(e => {
        that.captchaBtnLoading = false
      })
    },
    getReCaptcha() {
      this.captchaBtnLoading = true
      this.getCaptcha()
      this.timeDown()
    },
    timeDown() {
      let that = this
      clearInterval(that.captchaTimer)
      this.captchaTimer = null
      let s = 60  //倒计时间
      if (!that.captchaTimer) {
        that.captchaSecond = s
        that.captchaBtnDisabled = true
        that.captchaTimer = setInterval(() => {
          if (that.captchaSecond > 0 && this.captchaSecond <= s) {
            that.captchaSecond--
          } else {
            that.captchaBtnDisabled = false
            clearInterval(that.captchaTimer)
            this.captchaTimer = null
          }
        }, 1000)
      }
    },
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }

    .set-language {
      color: #fff;
      position: absolute;
      top: 3px;
      font-size: 18px;
      right: 0px;
      cursor: pointer;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .thirdparty-button {
    position: absolute;
    right: 0;
    bottom: 6px;
  }

  @media only screen and (max-width: 470px) {
    .thirdparty-button {
      display: none;
    }
  }
}
</style>
